It is always wise to wash your shower curtain. Shake it down a bit after every shower. A dry curtain keeps mold away. Other times, you can take it off of its hooks while it is dry. Then toss it in the machine with a couple of towels. Doing so allows to curtain to get scrubbed in the wash. Do not change the amount of soap you would use on a cycle that large. The big trick is to a little baking soda, maybe half a cup worth. Use hot water for a gentle cycle. Now you can hang it back up in your bathroom. After all, your shower curtain should now be mold free.
When it comes to the actual shower stall, make sure that you depend on non-toxic mold removal. Spray it all over. Get all of the walls, the floor and even the ceiling if you can reach. Do not be shy. Give it an hour and scrub it all off. Rely on hot water and a hard-bristled brush. Throw out any extra mold removal spray, as it does not maintain its potency.
Another option is to use bleach to clean off mold from your property. It works quicker, because it is much more powerful. Many folks do not like to expose themselves to such a harsh chemical. Those who do not mind using bleach can simply mix it 50-50 with water. Then it can be sprayed all over the walls, floors and ceiling. I little tip for your heart is to keep on the bathroom fan when working with anti-mold bleach.